Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ba5f4a0fa659ed…

MALICIOUS

PDF

47.9 KB Created: 2020-08-29 14:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35f12621e8c1f308b53f655d1377cf6a SHA-1: 97011cffcb40ca323c466a262db39c9f8c17d55c SHA-256: b3ba5f4a0fa659ed477dabbb12bcafc919a5c9b11526b22e9a211afbe50aabad
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Avengers infinity war soundtrack download'. The primary malicious IOC is the redirector URL, which is likely used to serve further malicious content or phishing pages. The PDF_SEO_LINK_FARM heuristic suggests this PDF is part of a larger link farm operation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=avengers+infinity+war+soundtrack+dow
    • https://static.usrfiles.com/ugd/b8c837_cd77c1e346f443b292d3469e10dc47bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f01171f9c174955a493cc254c41dbae.pdf
    • https://static.usrfiles.com/ugd/b8c837_f269841951a84bda85220ccb836d42c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f727f6ac632499190095df9fa5c858d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a357a50928244d5bb6def5c10414f7e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_761bf783b82f4dceab72610b8bd14f54.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f2b8e7dab6147c78548b4e5b26f0096.pdf
    • https://static.usrfiles.com/ugd/b8c837_0063d0cf51e140d7bd04ad652ac32610.pdf
    • https://cdn.shopify.com/s/files/1/0440/4166/6710/files/zonigepuxutukuxazawuze.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9125/files/niwinugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/48912682624.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2190/files/cc_link_ie_field_basic.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdc485f64a9e4057b15f325d968dca48.pdf
    • https://static.usrfiles.com/ugd/b8c837_e84c15c12f9e4d40a939c7ea81608acc.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004eec.bin
0b18e866f1f35ed162502fd5f8e0d42e089002f089f5c2ea01e5b569650eb3a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EEC 5464 bytes
font_01_sfnt_off000061aa.bin
ac7a9f6bf5b52e66481bf3d011f212d4e9ff93437d1b690dceaddd4d4d601280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61AA 17628 bytes
font_02_sfnt_off00009300.bin
e58e8e8d3617fa2f52d62469859eb662c26c1c1537dc21f5cc6f1aa71eaa6aed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9300 18776 bytes

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